2 // Copyright (C) 2006 Matthias Braun <matze@braunis.de>
4 // This program is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation, either version 3 of the License, or
7 // (at your option) any later version.
9 // This program is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License
15 // along with this program. If not, see <http://www.gnu.org/licenses/>.
17 #ifndef HEADER_SUPERTUX_SUPERTUX_SCREEN_FADE_HPP
18 #define HEADER_SUPERTUX_SUPERTUX_SCREEN_FADE_HPP
23 * Screen to be displayed simultaneously with another Screen.
25 * This is used for Screen transition effects like a fade-out or a shrink-fade
33 /** returns true if the effect is completed */
34 virtual bool done() = 0;
36 /** gets called once per frame. The ScreenFade should draw itself in
37 this function. State changes should not be done in this
38 function, but rather in update */
39 virtual void draw(DrawingContext& context) = 0;
41 /** gets called for once (per logical) frame. ScreenFades should do
42 their state updates and logic here */
43 virtual void update(float elapsed_time) = 0;